Garbage and sludge pyrolysis system and garbage treatment system

Abstract

The invention relates to the technical field of environmental protection, and provides a garbage and sludge pyrolysis system. The system comprises a pyrolysis gasifier, an air preheater, a sludge processor, a condenser and a tail gas treatment device, wherein the pyrolysis gasifier comprises a gasifier body and a feeding tank connected with the gasifier body; wet sludge is dried in the sludge processor and then transported to the feeding tank of the pyrolysis gasifier, and co-pyrolysis gasification treatment is conducted on household garbage and the transported sludge in the pyrolysis gasifier; meanwhile, waste gas generated by sludge drying and pyrolysis gasification gas generated by co-pyrolysis are transported to the pyrolysis gasifier through the air preheater to assist combustion and re-decomposition, flue gas generated by the pyrolysis gasifier is purified by the tail gas treatment device and then is in standard discharge. The system achieves sludge drying and the synergistic treatment of sludge and household garbage, and improves the utilization rate of pyrolysis gas, sludge and tar heat energy, and the pyrolysis gasification rate of garbage and sludge. Besides, the invention further provides a garbage treatment system including the garbage and sludge pyrolysis system.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a garbage and sludge pyrolysis system and a garbage treatment system. Background technique [0002] During the "13th Five-Year Plan" period, my country's domestic waste heat treatment technology will gradually replace the original sanitary landfill, composting and other technologies, and heat treatment technologies mainly include direct incineration, cement kiln co-processing and pyrolysis gasification technology. The domestic waste pyrolysis gasification technology cracks the organic components in the domestic waste at high temperature under oxygen-poor or anoxic conditions, so as to realize the reduction, recycling and harmless treatment of domestic waste. Compared with domestic waste sanitary landfill, composting and incineration power generation and other treatment technologies, domestic waste pyrolysis gasification technology has the advantages of no auxilia...

AI Technical Summary

Problems solved by technology

However, in the actual operation process, due to the relatively high cost of sludge disposal, most sewage treatment plants do not build sludge treatment plants, but after simple concentration and dehydration (water content is reduced to below 80%), they are transported to designated sites. place for stacking and landfilling

Stacking and landfilling are likely to cause secondary pollution to groundwater and soil, and with the development of urbanization, land scarcity is becoming more and more serious, and the sludge disposal method in my country needs to be changed urgently

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